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1. It is suggested that full diversity gain can be achieved over a Rayleigh faded MISO channel by simply transmitting the same symbol at each of the transmit antennas simultaneously. Is this correct? 2. An L × 1 MISO channel can be converted into a time diversity channel with L diversity branches by simply transmitting over one antenna at a time.
1. In this way, any code designed for a time diversity channel with L diversity branches can be used for a MISO (multiple input single output) channel with L transmit antennas. If the code achieves k-fold diversity in the time diversity channel, how much diversity can it obtain in the MISO channel? What is the relationship between the minimum product distance metric of the code when viewed as a time diversity code and its minimum determinant metric when viewed as a transmit diversity code?
2. Using this transformation, the rotation code can be used as a transmit diversity scheme. Compare the performance of this code and the Alamouti scheme in a 2 × 1 Rayleigh fading channel, using BPSK symbols. Which one is better? How about using QPSK symbols?
design a 2-digit 24 second shot-clock countdown timer with pushbutton controller. the pushbutton controller will have
A common source amplifier utilizes a mosfet for which Va= 12.5 V and is operated at Vov= .25V. What is the value of (gmro) The amplifier feed a load resistance RL= 15Kohms. The designer selects RD=2RL. If its required to realizes an overall voltag..
A half-wave rectifier circuit with a 1-Kwload operates from a 12-v(rms) 60-Hz household a 5-to 1 transformer having a center-tappedsecondary winding. It use two silicon diodes that can be modeled tohave a 0.7-v drop for all currents.
An amplifier output is being evaluated by a technician. The output is found to be a sine wave. The measured time lapse from one sine-wave peak to the next is 5 milliseconds.
The line current is 51 A and the shunt-field resistance is 120 ohm. If the armature resistance is 0.1 ohm, calculate the speed if the shunt-field resistance is doubled at no load condition. Suppose the terminal voltage VT does not change.
The IEEE safety limit for radiation exposure at this frequency is 0.2 mW/cm^2. Use this fact and your answer in part(a) to advise the local college students if it is a good idea to have a keg party at the base of the radio tower.
What are the techniques used to make feedback system stable? Explain and draw the frequency response of a 1-pole feedback amplifier.
Make a table showing Temperature as a function of pressure for Psat from 20 to 600 psia every 20 psi, and another table showing pressure as a function of temperature from 150 degrees to 350 degrees every 20 degrees.
a 3-phase slip ring induction motor gives a reading of 60volts,across a slip ring of open circuit. When at rest with normal statervoltage applied, the rotor is star connected and has an impedanceof (0.6+6j)Ω per phase.
An op-amp is to be selected for an inverting amplifier to be used at dc and very low frequencies. A closed-loop nominal gain of -100 is desired. Specification indicate that the error due to finite open-loop gain cannot exceed 0.1dB.
The river estuary is tidal causing the surface level of the water to rise and fall. At certain times of day, reflections from the water surface cause deep fading of the received signal.
An analog signal ranging between 0 and 1 V must be quantized. The midrange quantization errors must be no greater than 0.1V. How many quantization bits must be used to satisfy this requirement
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